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cib_client.c
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/*
* Copyright (c) 2004 Andrew Beekhof <andrew@beekhof.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <crm_internal.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <glib.h>
#include <crm/crm.h>
#include <crm/cib.h>
#include <crm/msg_xml.h>
#include <crm/common/xml.h>
#include <cib_private.h>
GHashTable *cib_op_callback_table = NULL;
int cib_client_set_op_callback(
cib_t *cib, void (*callback)(const xmlNode *msg, int call_id,
int rc, xmlNode *output));
int cib_client_add_notify_callback(
cib_t *cib, const char *event, void (*callback)(
const char *event, xmlNode *msg));
int cib_client_del_notify_callback(
cib_t *cib, const char *event, void (*callback)(
const char *event, xmlNode *msg));
gint ciblib_GCompareFunc(gconstpointer a, gconstpointer b);
#define op_common(cib) \
if(cib == NULL) { \
return cib_missing; \
} else if(cib->cmds->variant_op == NULL) { \
return cib_variant; \
}
static int cib_client_noop(cib_t *cib, int call_options)
{
op_common(cib)
return cib->cmds->variant_op(
cib, CRM_OP_NOOP, NULL, NULL, NULL, NULL, call_options);
}
static int cib_client_ping(cib_t *cib, xmlNode **output_data, int call_options)
{
op_common(cib)
return cib->cmds->variant_op(
cib, CRM_OP_PING, NULL,NULL,NULL, output_data, call_options);
}
static int cib_client_query(cib_t *cib, const char *section,
xmlNode **output_data, int call_options)
{
return cib->cmds->query_from(
cib, NULL, section, output_data, call_options);
}
static int cib_client_query_from(cib_t *cib, const char *host, const char *section,
xmlNode **output_data, int call_options)
{
op_common(cib)
return cib->cmds->variant_op(cib, CIB_OP_QUERY, host, section,
NULL, output_data, call_options);
}
static int cib_client_is_master(cib_t *cib)
{
op_common(cib)
return cib->cmds->variant_op(
cib, CIB_OP_ISMASTER, NULL, NULL,NULL,NULL,
cib_scope_local|cib_sync_call);
}
static int cib_client_set_slave(cib_t *cib, int call_options)
{
op_common(cib)
return cib->cmds->variant_op(
cib, CIB_OP_SLAVE, NULL,NULL,NULL,NULL, call_options);
}
static int cib_client_set_slave_all(cib_t *cib, int call_options)
{
op_common(cib)
return cib->cmds->variant_op(
cib, CIB_OP_SLAVEALL, NULL,NULL,NULL,NULL, call_options);
}
static int cib_client_set_master(cib_t *cib, int call_options)
{
op_common(cib)
crm_debug_3("Adding cib_scope_local to options");
return cib->cmds->variant_op(
cib, CIB_OP_MASTER, NULL,NULL,NULL,NULL,
call_options|cib_scope_local);
}
static int cib_client_bump_epoch(cib_t *cib, int call_options)
{
op_common(cib)
return cib->cmds->variant_op(
cib, CIB_OP_BUMP, NULL, NULL, NULL, NULL, call_options);
}
static int cib_client_upgrade(cib_t *cib, int call_options)
{
op_common(cib)
return cib->cmds->variant_op(
cib, CIB_OP_UPGRADE, NULL, NULL, NULL, NULL, call_options);
}
static int cib_client_sync(cib_t *cib, const char *section, int call_options)
{
return cib->cmds->sync_from(cib, NULL, section, call_options);
}
static int cib_client_sync_from(
cib_t *cib, const char *host, const char *section, int call_options)
{
op_common(cib)
return cib->cmds->variant_op(
cib, CIB_OP_SYNC, host, section, NULL, NULL, call_options);
}
static int cib_client_create(
cib_t *cib, const char *section, xmlNode *data, int call_options)
{
op_common(cib)
return cib->cmds->variant_op(
cib, CIB_OP_CREATE, NULL, section, data, NULL, call_options);
}
static int cib_client_modify(
cib_t *cib, const char *section, xmlNode *data, int call_options)
{
op_common(cib)
return cib->cmds->variant_op(
cib, CIB_OP_MODIFY, NULL, section, data, NULL, call_options);
}
static int cib_client_update(
cib_t *cib, const char *section, xmlNode *data, int call_options)
{
op_common(cib)
return cib->cmds->variant_op(
cib, CIB_OP_MODIFY, NULL, section, data, NULL, call_options);
}
static int cib_client_replace(
cib_t *cib, const char *section, xmlNode *data, int call_options)
{
op_common(cib)
return cib->cmds->variant_op(
cib, CIB_OP_REPLACE, NULL, section, data, NULL, call_options);
}
static int cib_client_delete(
cib_t *cib, const char *section, xmlNode *data, int call_options)
{
op_common(cib)
return cib->cmds->variant_op(
cib, CIB_OP_DELETE, NULL, section, data, NULL, call_options);
}
static int cib_client_delete_absolute(
cib_t *cib, const char *section, xmlNode *data, int call_options)
{
op_common(cib)
return cib->cmds->variant_op(
cib, CIB_OP_DELETE_ALT, NULL, section, data, NULL, call_options);
}
static int cib_client_erase(
cib_t *cib, xmlNode **output_data, int call_options)
{
op_common(cib)
return cib->cmds->variant_op(
cib, CIB_OP_ERASE, NULL, NULL, NULL, output_data, call_options);
}
static int cib_client_quit(cib_t *cib, int call_options)
{
op_common(cib)
return cib->cmds->variant_op(
cib, CRM_OP_QUIT, NULL, NULL, NULL, NULL, call_options);
}
static void cib_destroy_op_callback(gpointer data)
{
cib_callback_client_t *blob = data;
if(blob->timer && blob->timer->ref > 0) {
g_source_remove(blob->timer->ref);
}
crm_free(blob->timer);
crm_free(blob);
}
char *get_shadow_file(const char *suffix)
{
char *cib_home = NULL;
char *fullname = NULL;
char *name = crm_concat("shadow", suffix, '.');
const char *dir = getenv("CIB_shadow_dir");
if(dir == NULL) {
const char *user = getenv("USER");
if(safe_str_eq(user, "root") || safe_str_eq(user, CRM_DAEMON_USER)) {
dir = CRM_CONFIG_DIR;
} else {
const char *home = getenv("HOME");
dir = "/tmp";
if(home && home[0] == '/') {
int rc = 0;
cib_home = crm_concat(home, ".cib", '/');
rc = mkdir(cib_home, 0700);
if(rc < 0 && errno != EEXIST) {
crm_perror(LOG_ERR, "Couldn't create user-specific shadow directory: %s", cib_home);
errno = 0;
} else {
dir = cib_home;
}
}
}
}
fullname = crm_concat(dir, name, '/');
crm_free(cib_home);
crm_free(name);
return fullname;
}
cib_t*
cib_shadow_new(const char *shadow)
{
cib_t *new_cib = NULL;
char *shadow_file = NULL;
CRM_CHECK(shadow != NULL, return NULL);
shadow_file = get_shadow_file(shadow);
new_cib = cib_file_new(shadow_file);
crm_free(shadow_file);
return new_cib;
}
cib_t *cib_new_no_shadow(void)
{
unsetenv("CIB_shadow");
return cib_new();
}
cib_t*
cib_new(void)
{
const char *value = getenv("CIB_shadow");
if(value) {
return cib_shadow_new(value);
}
value = getenv("CIB_file");
if(value) {
return cib_file_new(value);
}
value = getenv("CIB_port");
if(value) {
gboolean encrypted = TRUE;
int port = crm_parse_int(value, NULL);
const char *server = getenv("CIB_server");
const char *user = getenv("CIB_user");
const char *pass = getenv("CIB_passwd");
value = getenv("CIB_encrypted");
if(value && crm_is_true(value) == FALSE) {
crm_info("Disabling TLS");
encrypted = FALSE;
}
if(user == NULL) {
user = CRM_DAEMON_USER;
crm_info("Defaulting to user: %s", user);
}
if(server == NULL) {
server = "localhost";
crm_info("Defaulting to localhost");
}
return cib_remote_new(server, user, pass, port, encrypted);
}
return cib_native_new();
}
/* this is backwards...
cib_*_new should call this not the other way around
*/
cib_t*
cib_new_variant(void)
{
cib_t* new_cib = NULL;
crm_malloc0(new_cib, sizeof(cib_t));
if(cib_op_callback_table != NULL) {
g_hash_table_destroy(cib_op_callback_table);
cib_op_callback_table = NULL;
}
if(cib_op_callback_table == NULL) {
cib_op_callback_table = g_hash_table_new_full(
g_direct_hash, g_direct_equal,
NULL, cib_destroy_op_callback);
}
new_cib->call_id = 1;
new_cib->variant = cib_undefined;
new_cib->type = cib_none;
new_cib->state = cib_disconnected;
new_cib->op_callback = NULL;
new_cib->variant_opaque = NULL;
new_cib->notify_list = NULL;
/* the rest will get filled in by the variant constructor */
crm_malloc0(new_cib->cmds, sizeof(cib_api_operations_t));
new_cib->cmds->set_op_callback = cib_client_set_op_callback;
new_cib->cmds->add_notify_callback = cib_client_add_notify_callback;
new_cib->cmds->del_notify_callback = cib_client_del_notify_callback;
new_cib->cmds->register_callback = cib_client_register_callback;
new_cib->cmds->noop = cib_client_noop;
new_cib->cmds->ping = cib_client_ping;
new_cib->cmds->query = cib_client_query;
new_cib->cmds->sync = cib_client_sync;
new_cib->cmds->query_from = cib_client_query_from;
new_cib->cmds->sync_from = cib_client_sync_from;
new_cib->cmds->is_master = cib_client_is_master;
new_cib->cmds->set_master = cib_client_set_master;
new_cib->cmds->set_slave = cib_client_set_slave;
new_cib->cmds->set_slave_all = cib_client_set_slave_all;
new_cib->cmds->upgrade = cib_client_upgrade;
new_cib->cmds->bump_epoch = cib_client_bump_epoch;
new_cib->cmds->create = cib_client_create;
new_cib->cmds->modify = cib_client_modify;
new_cib->cmds->update = cib_client_update;
new_cib->cmds->replace = cib_client_replace;
new_cib->cmds->delete = cib_client_delete;
new_cib->cmds->erase = cib_client_erase;
new_cib->cmds->quit = cib_client_quit;
new_cib->cmds->delete_absolute = cib_client_delete_absolute;
return new_cib;
}
void
cib_delete(cib_t *cib)
{
GList *list = cib->notify_list;
while(list != NULL) {
cib_notify_client_t *client = g_list_nth_data(list, 0);
list = g_list_remove(list, client);
crm_free(client);
}
g_hash_table_destroy(cib_op_callback_table);
cib->cmds->free(cib);
cib = NULL;
}
int
cib_client_set_op_callback(
cib_t *cib, void (*callback)(const xmlNode *msg, int call_id,
int rc, xmlNode *output))
{
if(callback == NULL) {
crm_info("Un-Setting operation callback");
} else {
crm_debug_3("Setting operation callback");
}
cib->op_callback = callback;
return cib_ok;
}
int cib_client_add_notify_callback(
cib_t *cib, const char *event, void (*callback)(
const char *event, xmlNode *msg))
{
GList *list_item = NULL;
cib_notify_client_t *new_client = NULL;
if(cib->variant != cib_native
&& cib->variant != cib_remote) {
return cib_NOTSUPPORTED;
}
crm_debug_2("Adding callback for %s events (%d)",
event, g_list_length(cib->notify_list));
crm_malloc0(new_client, sizeof(cib_notify_client_t));
new_client->event = event;
new_client->callback = callback;
list_item = g_list_find_custom(
cib->notify_list, new_client, ciblib_GCompareFunc);
if(list_item != NULL) {
crm_warn("Callback already present");
crm_free(new_client);
return cib_EXISTS;
} else {
cib->notify_list = g_list_append(
cib->notify_list, new_client);
cib->cmds->register_notification(cib, event, 1);
crm_debug_3("Callback added (%d)", g_list_length(cib->notify_list));
}
return cib_ok;
}
int cib_client_del_notify_callback(
cib_t *cib, const char *event, void (*callback)(
const char *event, xmlNode *msg))
{
GList *list_item = NULL;
cib_notify_client_t *new_client = NULL;
if(cib->variant != cib_native
&& cib->variant != cib_remote) {
return cib_NOTSUPPORTED;
}
crm_debug("Removing callback for %s events", event);
crm_malloc0(new_client, sizeof(cib_notify_client_t));
new_client->event = event;
new_client->callback = callback;
list_item = g_list_find_custom(
cib->notify_list, new_client, ciblib_GCompareFunc);
cib->cmds->register_notification(cib, event, 0);
if(list_item != NULL) {
cib_notify_client_t *list_client = list_item->data;
cib->notify_list =
g_list_remove(cib->notify_list, list_client);
crm_free(list_client);
crm_debug_3("Removed callback");
} else {
crm_debug_3("Callback not present");
}
crm_free(new_client);
return cib_ok;
}
gint ciblib_GCompareFunc(gconstpointer a, gconstpointer b)
{
int rc = 0;
const cib_notify_client_t *a_client = a;
const cib_notify_client_t *b_client = b;
CRM_CHECK(a_client->event != NULL && b_client->event != NULL, return 0);
rc = strcmp(a_client->event, b_client->event);
if(rc == 0) {
if(a_client->callback == b_client->callback) {
return 0;
} else if(((long)a_client->callback) < ((long)b_client->callback)) {
crm_err("callbacks for %s are not equal: %p vs. %p",
a_client->event, a_client->callback, b_client->callback);
return -1;
}
crm_err("callbacks for %s are not equal: %p vs. %p",
a_client->event, a_client->callback, b_client->callback);
return 1;
}
return rc;
}
static gboolean cib_async_timeout_handler(gpointer data)
{
struct timer_rec_s *timer = data;
crm_debug("Async call %d timed out after %ds", timer->call_id, timer->timeout);
cib_native_callback(timer->cib, NULL, timer->call_id, cib_remote_timeout);
/* Always return TRUE, never remove the handler
* We do that in remove_cib_op_callback()
*/
return TRUE;
}
gboolean
cib_client_register_callback(
cib_t *cib, int call_id, int timeout, gboolean only_success, void *user_data,
const char *callback_name, void (*callback)(xmlNode*, int, int, xmlNode*,void*))
{
cib_callback_client_t *blob = NULL;
if(call_id < 0) {
if(only_success == FALSE) {
callback(NULL, call_id, call_id, NULL, user_data);
} else {
crm_warn("CIB call failed: %s", cib_error2string(call_id));
}
return FALSE;
}
crm_malloc0(blob, sizeof(cib_callback_client_t));
blob->id = callback_name;
blob->only_success = only_success;
blob->user_data = user_data;
blob->callback = callback;
if(timeout > 0) {
struct timer_rec_s *async_timer = NULL;
crm_malloc0(async_timer, sizeof(struct timer_rec_s));
blob->timer = async_timer;
async_timer->cib = cib;
async_timer->call_id = call_id;
async_timer->timeout = timeout*1000;
async_timer->ref = g_timeout_add(
async_timer->timeout, cib_async_timeout_handler, async_timer);
}
g_hash_table_insert(cib_op_callback_table, GINT_TO_POINTER(call_id), blob);
return TRUE;
}
void
remove_cib_op_callback(int call_id, gboolean all_callbacks)
{
if(all_callbacks) {
if(cib_op_callback_table != NULL) {
g_hash_table_destroy(cib_op_callback_table);
}
cib_op_callback_table = g_hash_table_new_full(
g_direct_hash, g_direct_equal,
NULL, cib_destroy_op_callback);
} else {
g_hash_table_remove(cib_op_callback_table, GINT_TO_POINTER(call_id));
}
}
int
num_cib_op_callbacks(void)
{
if(cib_op_callback_table == NULL) {
return 0;
}
return g_hash_table_size(cib_op_callback_table);
}
static void cib_dump_pending_op(gpointer key, gpointer value, gpointer user_data)
{
int call = GPOINTER_TO_INT(key);
cib_callback_client_t *blob = value;
crm_debug("Call %d (%s): pending", call, crm_str(blob->id));
}
void cib_dump_pending_callbacks(void)
{
if(cib_op_callback_table == NULL) {
return;
}
return g_hash_table_foreach(cib_op_callback_table, cib_dump_pending_op, NULL);
}

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